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From: Brian Candler <B.Candler@pobox.com>
To: Stan Hoeppner <stan@hardwarefreak.com>
Cc: Christoph Hellwig <hch@infradead.org>, xfs@oss.sgi.com
Subject: Re: Performance problem - reads slower than writes
Date: Sat, 4 Feb 2012 11:24:36 +0000	[thread overview]
Message-ID: <20120204112436.GA3167@nsrc.org> (raw)
In-Reply-To: <4F2D016C.9020406@hardwarefreak.com>

On Sat, Feb 04, 2012 at 03:59:08AM -0600, Stan Hoeppner wrote:
> Will you be using mdraid or hardware RAID across those 24 spindles?

Gluster is the front-runner at the moment. Each file sits on a single
spindle, and there is a separate filesystem per spindle, so I think the
parallel processing will work much better this way. This does mean double
the disks to get data replication though.

I did some testing of RAID6 mdraid (12 disks with with 1MB stripe size) and
it sucked.  However I need to re-test it now that I know about inode64.
We do have a requirement for archival storage and that might use RAID6.

Regards,

Brian.

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  reply	other threads:[~2012-02-04 11:24 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-30 22:00 Performance problem - reads slower than writes Brian Candler
2012-01-31  2:05 ` Dave Chinner
2012-01-31 10:31   ` Brian Candler
2012-01-31 14:16     ` Brian Candler
2012-01-31 20:25       ` Dave Chinner
2012-02-01  7:29         ` Stan Hoeppner
2012-02-03 18:47         ` Brian Candler
2012-02-03 19:03           ` Christoph Hellwig
2012-02-03 21:01             ` Brian Candler
2012-02-03 21:17               ` Brian Candler
2012-02-05 22:50                 ` Dave Chinner
2012-02-05 22:43               ` Dave Chinner
2012-01-31 14:52     ` Christoph Hellwig
2012-01-31 21:52       ` Brian Candler
2012-02-01  0:50         ` Raghavendra D Prabhu
2012-02-01  3:59         ` Dave Chinner
2012-02-03 11:54       ` Brian Candler
2012-02-03 19:42         ` Stan Hoeppner
2012-02-03 22:10           ` Brian Candler
2012-02-04  9:59             ` Stan Hoeppner
2012-02-04 11:24               ` Brian Candler [this message]
2012-02-04 12:49                 ` Stan Hoeppner
2012-02-04 20:04                   ` Brian Candler
2012-02-04 20:44                     ` Joe Landman
2012-02-06 10:40                       ` Brian Candler
2012-02-07 17:30                       ` Brian Candler
2012-02-05  5:16                     ` Stan Hoeppner
2012-02-05  9:05                       ` Brian Candler
2012-01-31 20:06     ` Dave Chinner
2012-01-31 21:35       ` Brian Candler

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